The Swiss finalized their no-wars policy of armed neutrality in 1815. Their decentralized citizen army was good enough to keep them out of the Franco-Prussian War of 1870, World War I, and other European gang fights. In 1934, they addressed the looming threat of aerial bombing by starting a massive civil-defense effort. They maintained their citizen army and kept out of World War II, even while provoking Hitler by letting Jews hide their assets in secret Swiss bank accounts. Many Jews only escaped the Holocaust because they had their money where Nazi tax authorities couldnt get it.

Hitler was in fact very provoked by the Swiss. His generals even got as far as giving the invasion of Switzerland the name Operation Tannenbaum and drawing lines on maps for it. However, no matter how they drew the lines, they couldnt overcome the reality that there were no critical central targets for mechanized blitzkrieg to disrupt. Every house in Switzerland was a center of resistance. The Wehrmacht paratroopers couldnt beat a defense that covered every square centimeter of the country with accurate rifle fire, and they knew it.